package lab02.test20;

import java.util.Scanner;

/**
 * Created by 14394 on 2017/11/13.
 */
public class Test {
    public static void main(String[] args) {
        Scanner s=new Scanner(System.in);
        String content=s.next();
        int size=content.getBytes().length;
        for (int i=0;i<size;){
            char tmp=content.charAt(i++);
            if (tmp<0||tmp>9) continue;
            System.out.print(tmp);
        }
    }
}
